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1 282 jeremybenn
/*{{{  Comment.  */
2
 
3
/* Definitions of FR30 target.
4
   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2007, 2008, 2009
5
   Free Software Foundation, Inc.
6
   Contributed by Cygnus Solutions.
7
 
8
This file is part of GCC.
9
 
10
GCC is free software; you can redistribute it and/or modify
11
it under the terms of the GNU General Public License as published by
12
the Free Software Foundation; either version 3, or (at your option)
13
any later version.
14
 
15
GCC is distributed in the hope that it will be useful,
16
but WITHOUT ANY WARRANTY; without even the implied warranty of
17
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18
GNU General Public License for more details.
19
 
20
You should have received a copy of the GNU General Public License
21
along with GCC; see the file COPYING3.  If not see
22
<http://www.gnu.org/licenses/>.  */
23
 
24
/*}}}*/ 
25
/*{{{  Driver configuration.  */
26
 
27
/* Defined in svr4.h.  */
28
#undef SWITCH_TAKES_ARG
29
 
30
/* Defined in svr4.h.  */
31
#undef WORD_SWITCH_TAKES_ARG
32
 
33
/*}}}*/ 
34
/*{{{  Run-time target specifications.  */
35
 
36
#undef  ASM_SPEC
37
#define ASM_SPEC "%{v}"
38
 
39
/* Define this to be a string constant containing `-D' options to define the
40
   predefined macros that identify this machine and system.  These macros will
41
   be predefined unless the `-ansi' option is specified.  */
42
 
43
#define TARGET_CPU_CPP_BUILTINS()               \
44
  do                                            \
45
    {                                           \
46
      builtin_define_std ("fr30");              \
47
      builtin_assert ("machine=fr30");          \
48
    }                                           \
49
   while (0)
50
 
51
#define TARGET_VERSION fprintf (stderr, " (fr30)");
52
 
53
#define CAN_DEBUG_WITHOUT_FP
54
 
55
#undef  STARTFILE_SPEC
56
#define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
57
 
58
/* Include the OS stub library, so that the code can be simulated.
59
   This is not the right way to do this.  Ideally this kind of thing
60
   should be done in the linker script - but I have not worked out how
61
   to specify the location of a linker script in a gcc command line yet... */
62
#undef  ENDFILE_SPEC
63
#define ENDFILE_SPEC  "%{!mno-lsim:-lsim} crtend.o%s crtn.o%s"
64
 
65
/*}}}*/ 
66
/*{{{  Storage Layout.  */
67
 
68
#define BITS_BIG_ENDIAN 1
69
 
70
#define BYTES_BIG_ENDIAN 1
71
 
72
#define WORDS_BIG_ENDIAN 1
73
 
74
#define UNITS_PER_WORD  4
75
 
76
#define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE)       \
77
  do                                            \
78
    {                                           \
79
      if (GET_MODE_CLASS (MODE) == MODE_INT     \
80
          && GET_MODE_SIZE (MODE) < 4)          \
81
        (MODE) = SImode;                        \
82
    }                                           \
83
  while (0)
84
 
85
#define PARM_BOUNDARY 32
86
 
87
#define STACK_BOUNDARY 32
88
 
89
#define FUNCTION_BOUNDARY 32
90
 
91
#define BIGGEST_ALIGNMENT 32
92
 
93
#define DATA_ALIGNMENT(TYPE, ALIGN)             \
94
  (TREE_CODE (TYPE) == ARRAY_TYPE               \
95
   && TYPE_MODE (TREE_TYPE (TYPE)) == QImode    \
96
   && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
97
 
98
#define CONSTANT_ALIGNMENT(EXP, ALIGN)  \
99
  (TREE_CODE (EXP) == STRING_CST        \
100
   && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
101
 
102
#define STRICT_ALIGNMENT 1
103
 
104
/* Defined in svr4.h.  */
105
#define PCC_BITFIELD_TYPE_MATTERS 1
106
 
107
/*}}}*/ 
108
/*{{{  Layout of Source Language Data Types.  */
109
 
110
#define SHORT_TYPE_SIZE         16
111
#define INT_TYPE_SIZE           32
112
#define LONG_TYPE_SIZE          32
113
#define LONG_LONG_TYPE_SIZE     64
114
#define FLOAT_TYPE_SIZE         32
115
#define DOUBLE_TYPE_SIZE        64
116
#define LONG_DOUBLE_TYPE_SIZE   64
117
 
118
#define DEFAULT_SIGNED_CHAR 1
119
 
120
/*}}}*/ 
121
/*{{{  REGISTER BASICS.  */
122
 
123
/* Number of hardware registers known to the compiler.  They receive numbers 0
124
   through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
125
   really is assigned the number `FIRST_PSEUDO_REGISTER'.  */
126
#define FIRST_PSEUDO_REGISTER   21
127
 
128
/* Fixed register assignments: */
129
 
130
/* Here we do a BAD THING - reserve a register for use by the machine
131
   description file.  There are too many places in compiler where it
132
   assumes that it can issue a branch or jump instruction without
133
   providing a scratch register for it, and reload just cannot cope, so
134
   we keep a register back for these situations.  */
135
#define COMPILER_SCRATCH_REGISTER 0
136
 
137
/* The register that contains the result of a function call.  */
138
#define RETURN_VALUE_REGNUM      4
139
 
140
/* The first register that can contain the arguments to a function.  */
141
#define FIRST_ARG_REGNUM         4
142
 
143
/* A call-used register that can be used during the function prologue.  */
144
#define PROLOGUE_TMP_REGNUM      COMPILER_SCRATCH_REGISTER
145
 
146
/* Register numbers used for passing a function's static chain pointer.  If
147
   register windows are used, the register number as seen by the called
148
   function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
149
   seen by the calling function is `STATIC_CHAIN_REGNUM'.  If these registers
150
   are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
151
 
152
   The static chain register need not be a fixed register.
153
 
154
   If the static chain is passed in memory, these macros should not be defined;
155
   instead, the next two macros should be defined.  */
156
#define STATIC_CHAIN_REGNUM     12
157
/* #define STATIC_CHAIN_INCOMING_REGNUM */
158
 
159
/* An FR30 specific hardware register.  */
160
#define ACCUMULATOR_REGNUM      13
161
 
162
/* The register number of the frame pointer register, which is used to access
163
   automatic variables in the stack frame.  On some machines, the hardware
164
   determines which register this is.  On other machines, you can choose any
165
   register you wish for this purpose.  */
166
#define FRAME_POINTER_REGNUM    14
167
 
168
/* The register number of the stack pointer register, which must also be a
169
   fixed register according to `FIXED_REGISTERS'.  On most machines, the
170
   hardware determines which register this is.  */
171
#define STACK_POINTER_REGNUM    15
172
 
173
/* The following a fake hard registers that describe some of the dedicated
174
   registers on the FR30.  */
175
#define CONDITION_CODE_REGNUM   16
176
#define RETURN_POINTER_REGNUM   17
177
#define MD_HIGH_REGNUM          18
178
#define MD_LOW_REGNUM           19
179
 
180
/* An initializer that says which registers are used for fixed purposes all
181
   throughout the compiled code and are therefore not available for general
182
   allocation.  These would include the stack pointer, the frame pointer
183
   (except on machines where that can be used as a general register when no
184
   frame pointer is needed), the program counter on machines where that is
185
   considered one of the addressable registers, and any other numbered register
186
   with a standard use.
187
 
188
   This information is expressed as a sequence of numbers, separated by commas
189
   and surrounded by braces.  The Nth number is 1 if register N is fixed, 0
190
   otherwise.
191
 
192
   The table initialized from this macro, and the table initialized by the
193
   following one, may be overridden at run time either automatically, by the
194
   actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the
195
   command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'.  */
196
#define FIXED_REGISTERS                         \
197
  { 1, 0, 0, 0, 0, 0, 0, 0,    /*  0 -  7 */   \
198
    0, 0, 0, 0, 0, 0, 0, 1,    /*  8 - 15 */   \
199
    1, 1, 1, 1, 1 }             /* 16 - 20 */
200
 
201
/* XXX - MDL and MDH set as fixed for now - this is until I can get the
202
   mul patterns working.  */
203
 
204
/* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
205
   general) by function calls as well as for fixed registers.  This macro
206
   therefore identifies the registers that are not available for general
207
   allocation of values that must live across function calls.
208
 
209
   If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
210
   saves it on function entry and restores it on function exit, if the register
211
   is used within the function.  */
212
#define CALL_USED_REGISTERS                     \
213
  { 1, 1, 1, 1, 1, 1, 1, 1,     /*  0 -  7 */   \
214
    0, 0, 0, 0, 1, 1, 0, 1,  /*  8 - 15 */   \
215
    1, 1, 1, 1, 1 }             /* 16 - 20 */
216
 
217
/* A C initializer containing the assembler's names for the machine registers,
218
   each one as a C string constant.  This is what translates register numbers
219
   in the compiler into assembler language.  */
220
#define REGISTER_NAMES                                          \
221
{   "r0", "r1", "r2",  "r3",  "r4",  "r5", "r6", "r7",  \
222
    "r8", "r9", "r10", "r11", "r12", "ac", "fp", "sp",  \
223
    "cc", "rp", "mdh", "mdl", "ap"                      \
224
}
225
 
226
/* If defined, a C initializer for an array of structures containing a name and
227
   a register number.  This macro defines additional names for hard registers,
228
   thus allowing the `asm' option in declarations to refer to registers using
229
   alternate names.  */
230
#define ADDITIONAL_REGISTER_NAMES                               \
231
{                                                               \
232
  {"r13", 13}, {"r14", 14}, {"r15", 15}, {"usp", 15}, {"ps", 16}\
233
}
234
 
235
/*}}}*/ 
236
/*{{{  How Values Fit in Registers.  */
237
 
238
/* A C expression for the number of consecutive hard registers, starting at
239
   register number REGNO, required to hold a value of mode MODE.  */
240
 
241
#define HARD_REGNO_NREGS(REGNO, MODE)                   \
242
  ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
243
 
244
/* A C expression that is nonzero if it is permissible to store a value of mode
245
   MODE in hard register number REGNO (or in several registers starting with
246
   that one).  */
247
 
248
#define HARD_REGNO_MODE_OK(REGNO, MODE) 1
249
 
250
/* A C expression that is nonzero if it is desirable to choose register
251
   allocation so as to avoid move instructions between a value of mode MODE1
252
   and a value of mode MODE2.
253
 
254
   If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
255
   ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
256
   zero.  */
257
#define MODES_TIEABLE_P(MODE1, MODE2) 1
258
 
259
/*}}}*/ 
260
/*{{{  Register Classes.  */
261
 
262
/* An enumeral type that must be defined with all the register class names as
263
   enumeral values.  `NO_REGS' must be first.  `ALL_REGS' must be the last
264
   register class, followed by one more enumeral value, `LIM_REG_CLASSES',
265
   which is not a register class but rather tells how many classes there are.
266
 
267
   Each register class has a number, which is the value of casting the class
268
   name to type `int'.  The number serves as an index in many of the tables
269
   described below.  */
270
enum reg_class
271
{
272
  NO_REGS,
273
  MULTIPLY_32_REG,      /* the MDL register as used by the MULH, MULUH insns */
274
  MULTIPLY_64_REG,      /* the MDH,MDL register pair as used by MUL and MULU */
275
  LOW_REGS,             /* registers 0 through 7 */
276
  HIGH_REGS,            /* registers 8 through 15 */
277
  REAL_REGS,            /* i.e. all the general hardware registers on the FR30 */
278
  ALL_REGS,
279
  LIM_REG_CLASSES
280
};
281
 
282
#define GENERAL_REGS    REAL_REGS
283
#define N_REG_CLASSES   ((int) LIM_REG_CLASSES)
284
 
285
#define IRA_COVER_CLASSES                               \
286
{                                                       \
287
  REAL_REGS, MULTIPLY_64_REG, LIM_REG_CLASSES           \
288
}
289
 
290
/* An initializer containing the names of the register classes as C string
291
   constants.  These names are used in writing some of the debugging dumps.  */
292
#define REG_CLASS_NAMES \
293
{                       \
294
  "NO_REGS",            \
295
  "MULTIPLY_32_REG",    \
296
  "MULTIPLY_64_REG",    \
297
  "LOW_REGS",           \
298
  "HIGH_REGS",          \
299
  "REAL_REGS",          \
300
  "ALL_REGS"            \
301
 }
302
 
303
/* An initializer containing the contents of the register classes, as integers
304
   which are bit masks.  The Nth integer specifies the contents of class N.
305
   The way the integer MASK is interpreted is that register R is in the class
306
   if `MASK & (1 << R)' is 1.
307
 
308
   When the machine has more than 32 registers, an integer does not suffice.
309
   Then the integers are replaced by sub-initializers, braced groupings
310
   containing several integers.  Each sub-initializer must be suitable as an
311
   initializer for the type `HARD_REG_SET' which is defined in
312
   `hard-reg-set.h'.  */
313
#define REG_CLASS_CONTENTS                              \
314
{                                                       \
315
  { 0 },                                         \
316
  { 1 << MD_LOW_REGNUM },                               \
317
  { (1 << MD_LOW_REGNUM) | (1 << MD_HIGH_REGNUM) },     \
318
  { (1 << 8) - 1 },                                     \
319
  { ((1 << 8) - 1) << 8 },                              \
320
  { (1 << CONDITION_CODE_REGNUM) - 1 },                 \
321
  { (1 << FIRST_PSEUDO_REGISTER) - 1 }                  \
322
}
323
 
324
/* A C expression whose value is a register class containing hard register
325
   REGNO.  In general there is more than one such class; choose a class which
326
   is "minimal", meaning that no smaller class also contains the register.  */
327
#define REGNO_REG_CLASS(REGNO)                  \
328
  ( (REGNO) < 8 ? LOW_REGS                      \
329
  : (REGNO) < CONDITION_CODE_REGNUM ? HIGH_REGS \
330
  : (REGNO) == MD_LOW_REGNUM ? MULTIPLY_32_REG  \
331
  : (REGNO) == MD_HIGH_REGNUM ? MULTIPLY_64_REG \
332
  : ALL_REGS)
333
 
334
/* A macro whose definition is the name of the class to which a valid base
335
   register must belong.  A base register is one used in an address which is
336
   the register value plus a displacement.  */
337
#define BASE_REG_CLASS  REAL_REGS
338
 
339
/* A macro whose definition is the name of the class to which a valid index
340
   register must belong.  An index register is one used in an address where its
341
   value is either multiplied by a scale factor or added to another register
342
   (as well as added to a displacement).  */
343
#define INDEX_REG_CLASS REAL_REGS
344
 
345
/* A C expression which defines the machine-dependent operand constraint
346
   letters for register classes.  If CHAR is such a letter, the value should be
347
   the register class corresponding to it.  Otherwise, the value should be
348
   `NO_REGS'.  The register letter `r', corresponding to class `GENERAL_REGS',
349
   will not be passed to this macro; you do not need to handle it.
350
 
351
   The following letters are unavailable, due to being used as
352
   constraints:
353
        '0'..'9'
354
        '<', '>'
355
        'E', 'F', 'G', 'H'
356
        'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P'
357
        'Q', 'R', 'S', 'T', 'U'
358
        'V', 'X'
359
        'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */
360
 
361
#define REG_CLASS_FROM_LETTER(CHAR)     \
362
     (  (CHAR) == 'd' ? MULTIPLY_64_REG \
363
      : (CHAR) == 'e' ? MULTIPLY_32_REG \
364
      : (CHAR) == 'h' ? HIGH_REGS       \
365
      : (CHAR) == 'l' ? LOW_REGS        \
366
      : (CHAR) == 'a' ? ALL_REGS        \
367
      : NO_REGS)
368
 
369
/* A C expression which is nonzero if register number NUM is suitable for use
370
   as a base register in operand addresses.  It may be either a suitable hard
371
   register or a pseudo register that has been allocated such a hard register.  */
372
#define REGNO_OK_FOR_BASE_P(NUM) 1
373
 
374
/* A C expression which is nonzero if register number NUM is suitable for use
375
   as an index register in operand addresses.  It may be either a suitable hard
376
   register or a pseudo register that has been allocated such a hard register.
377
 
378
   The difference between an index register and a base register is that the
379
   index register may be scaled.  If an address involves the sum of two
380
   registers, neither one of them scaled, then either one may be labeled the
381
   "base" and the other the "index"; but whichever labeling is used must fit
382
   the machine's constraints of which registers may serve in each capacity.
383
   The compiler will try both labelings, looking for one that is valid, and
384
   will reload one or both registers only if neither labeling works.  */
385
#define REGNO_OK_FOR_INDEX_P(NUM) 1
386
 
387
/* A C expression that places additional restrictions on the register class to
388
   use when it is necessary to copy value X into a register in class CLASS.
389
   The value is a register class; perhaps CLASS, or perhaps another, smaller
390
   class.  On many machines, the following definition is safe:
391
 
392
        #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
393
 
394
   Sometimes returning a more restrictive class makes better code.  For
395
   example, on the 68000, when X is an integer constant that is in range for a
396
   `moveq' instruction, the value of this macro is always `DATA_REGS' as long
397
   as CLASS includes the data registers.  Requiring a data register guarantees
398
   that a `moveq' will be used.
399
 
400
   If X is a `const_double', by returning `NO_REGS' you can force X into a
401
   memory constant.  This is useful on certain machines where immediate
402
   floating values cannot be loaded into certain kinds of registers.  */
403
#define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS
404
 
405
/* A C expression for the maximum number of consecutive registers of
406
   class CLASS needed to hold a value of mode MODE.
407
 
408
   This is closely related to the macro `HARD_REGNO_NREGS'.  In fact, the value
409
   of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of
410
   `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS.
411
 
412
   This macro helps control the handling of multiple-word values in
413
   the reload pass.  */
414
#define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (0, MODE)
415
 
416
/*}}}*/ 
417
/*{{{  CONSTANTS.  */
418
 
419
/* A C expression that defines the machine-dependent operand constraint letters
420
   (`I', `J', `K', .. 'P') that specify particular ranges of integer values.
421
   If C is one of those letters, the expression should check that VALUE, an
422
   integer, is in the appropriate range and return 1 if so, 0 otherwise.  If C
423
   is not one of those letters, the value should be 0 regardless of VALUE.  */
424
#define CONST_OK_FOR_LETTER_P(VALUE, C)                         \
425
 (  (C) == 'I' ? IN_RANGE (VALUE,    0,       15)                \
426
  : (C) == 'J' ? IN_RANGE (VALUE,  -16,       -1)               \
427
  : (C) == 'K' ? IN_RANGE (VALUE,   16,       31)               \
428
  : (C) == 'L' ? IN_RANGE (VALUE,    0,       (1 <<  8) - 1)     \
429
  : (C) == 'M' ? IN_RANGE (VALUE,    0,       (1 << 20) - 1)     \
430
  : (C) == 'P' ? IN_RANGE (VALUE,  -(1 << 8), (1 <<  8) - 1)    \
431
  : 0)
432
 
433
/* A C expression that defines the machine-dependent operand constraint letters
434
   (`G', `H') that specify particular ranges of `const_double' values.
435
 
436
   If C is one of those letters, the expression should check that VALUE, an RTX
437
   of code `const_double', is in the appropriate range and return 1 if so, 0
438
   otherwise.  If C is not one of those letters, the value should be 0
439
   regardless of VALUE.
440
 
441
   `const_double' is used for all floating-point constants and for `DImode'
442
   fixed-point constants.  A given letter can accept either or both kinds of
443
   values.  It can use `GET_MODE' to distinguish between these kinds.  */
444
#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) 0
445
 
446
/* A C expression that defines the optional machine-dependent constraint
447
   letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
448
   types of operands, usually memory references, for the target machine.
449
   Normally this macro will not be defined.  If it is required for a particular
450
   target machine, it should return 1 if VALUE corresponds to the operand type
451
   represented by the constraint letter C.  If C is not defined as an extra
452
   constraint, the value returned should be 0 regardless of VALUE.
453
 
454
   For example, on the ROMP, load instructions cannot have their output in r0
455
   if the memory reference contains a symbolic address.  Constraint letter `Q'
456
   is defined as representing a memory address that does *not* contain a
457
   symbolic address.  An alternative is specified with a `Q' constraint on the
458
   input and `r' on the output.  The next alternative specifies `m' on the
459
   input and a register class that does not include r0 on the output.  */
460
#define EXTRA_CONSTRAINT(VALUE, C) \
461
   ((C) == 'Q' ? (GET_CODE (VALUE) == MEM && GET_CODE (XEXP (VALUE, 0)) == SYMBOL_REF) : 0)
462
 
463
/*}}}*/ 
464
/*{{{  Basic Stack Layout.  */
465
 
466
/* Define this macro if pushing a word onto the stack moves the stack pointer
467
   to a smaller address.  */
468
#define STACK_GROWS_DOWNWARD 1
469
 
470
/* Define this to macro nonzero if the addresses of local variable slots
471
   are at negative offsets from the frame pointer.  */
472
#define FRAME_GROWS_DOWNWARD 1
473
 
474
/* Offset from the frame pointer to the first local variable slot to be
475
   allocated.
476
 
477
   If `FRAME_GROWS_DOWNWARD', find the next slot's offset by subtracting the
478
   first slot's length from `STARTING_FRAME_OFFSET'.  Otherwise, it is found by
479
   adding the length of the first slot to the value `STARTING_FRAME_OFFSET'.  */
480
/* #define STARTING_FRAME_OFFSET -4 */
481
#define STARTING_FRAME_OFFSET 0
482
 
483
/* Offset from the stack pointer register to the first location at which
484
   outgoing arguments are placed.  If not specified, the default value of zero
485
   is used.  This is the proper value for most machines.
486
 
487
   If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
488
   location at which outgoing arguments are placed.  */
489
#define STACK_POINTER_OFFSET 0
490
 
491
/* Offset from the argument pointer register to the first argument's address.
492
   On some machines it may depend on the data type of the function.
493
 
494
   If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
495
   argument's address.  */
496
#define FIRST_PARM_OFFSET(FUNDECL) 0
497
 
498
/* A C expression whose value is RTL representing the location of the incoming
499
   return address at the beginning of any function, before the prologue.  This
500
   RTL is either a `REG', indicating that the return value is saved in `REG',
501
   or a `MEM' representing a location in the stack.
502
 
503
   You only need to define this macro if you want to support call frame
504
   debugging information like that provided by DWARF 2.  */
505
#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (SImode, RETURN_POINTER_REGNUM)
506
 
507
/*}}}*/ 
508
/*{{{  Register That Address the Stack Frame.  */
509
 
510
/* The register number of the arg pointer register, which is used to access the
511
   function's argument list.  On some machines, this is the same as the frame
512
   pointer register.  On some machines, the hardware determines which register
513
   this is.  On other machines, you can choose any register you wish for this
514
   purpose.  If this is not the same register as the frame pointer register,
515
   then you must mark it as a fixed register according to `FIXED_REGISTERS', or
516
   arrange to be able to eliminate it.  */
517
#define ARG_POINTER_REGNUM 20
518
 
519
/*}}}*/ 
520
/*{{{  Eliminating the Frame Pointer and the Arg Pointer.  */
521
 
522
/* If defined, this macro specifies a table of register pairs used to eliminate
523
   unneeded registers that point into the stack frame.  If it is not defined,
524
   the only elimination attempted by the compiler is to replace references to
525
   the frame pointer with references to the stack pointer.
526
 
527
   The definition of this macro is a list of structure initializations, each of
528
   which specifies an original and replacement register.
529
 
530
   On some machines, the position of the argument pointer is not known until
531
   the compilation is completed.  In such a case, a separate hard register must
532
   be used for the argument pointer.  This register can be eliminated by
533
   replacing it with either the frame pointer or the argument pointer,
534
   depending on whether or not the frame pointer has been eliminated.
535
 
536
   In this case, you might specify:
537
        #define ELIMINABLE_REGS  \
538
        {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
539
         {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
540
         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
541
 
542
   Note that the elimination of the argument pointer with the stack pointer is
543
   specified first since that is the preferred elimination.  */
544
 
545
#define ELIMINABLE_REGS                         \
546
{                                               \
547
  {ARG_POINTER_REGNUM,   STACK_POINTER_REGNUM}, \
548
  {ARG_POINTER_REGNUM,   FRAME_POINTER_REGNUM}, \
549
  {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}  \
550
}
551
 
552
/* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'.  It specifies the
553
   initial difference between the specified pair of registers.  This macro must
554
   be defined if `ELIMINABLE_REGS' is defined.  */
555
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
556
     (OFFSET) = fr30_compute_frame_size (FROM, TO)
557
 
558
/*}}}*/ 
559
/*{{{  Passing Function Arguments on the Stack.  */
560
 
561
/* If defined, the maximum amount of space required for outgoing arguments will
562
   be computed and placed into the variable
563
   `crtl->outgoing_args_size'.  No space will be pushed onto the
564
   stack for each call; instead, the function prologue should increase the
565
   stack frame size by this amount.
566
 
567
   Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
568
   proper.  */
569
#define ACCUMULATE_OUTGOING_ARGS 1
570
 
571
/* A C expression that should indicate the number of bytes of its own arguments
572
   that a function pops on returning, or 0 if the function pops no arguments
573
   and the caller must therefore pop them all after the function returns.
574
 
575
   FUNDECL is a C variable whose value is a tree node that describes the
576
   function in question.  Normally it is a node of type `FUNCTION_DECL' that
577
   describes the declaration of the function.  From this it is possible to
578
   obtain the DECL_ATTRIBUTES of the function.
579
 
580
   FUNTYPE is a C variable whose value is a tree node that describes the
581
   function in question.  Normally it is a node of type `FUNCTION_TYPE' that
582
   describes the data type of the function.  From this it is possible to obtain
583
   the data types of the value and arguments (if known).
584
 
585
   When a call to a library function is being considered, FUNTYPE will contain
586
   an identifier node for the library function.  Thus, if you need to
587
   distinguish among various library functions, you can do so by their names.
588
   Note that "library function" in this context means a function used to
589
   perform arithmetic, whose name is known specially in the compiler and was
590
   not mentioned in the C code being compiled.
591
 
592
   STACK-SIZE is the number of bytes of arguments passed on the stack.  If a
593
   variable number of bytes is passed, it is zero, and argument popping will
594
   always be the responsibility of the calling function.
595
 
596
   On the VAX, all functions always pop their arguments, so the definition of
597
   this macro is STACK-SIZE.  On the 68000, using the standard calling
598
   convention, no functions pop their arguments, so the value of the macro is
599
   always 0 in this case.  But an alternative calling convention is available
600
   in which functions that take a fixed number of arguments pop them but other
601
   functions (such as `printf') pop nothing (the caller pops all).  When this
602
   convention is in use, FUNTYPE is examined to determine whether a function
603
   takes a fixed number of arguments.  */
604
#define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
605
 
606
/*}}}*/ 
607
/*{{{  Function Arguments in Registers.  */
608
 
609
/* The number of register assigned to holding function arguments.  */
610
 
611
#define FR30_NUM_ARG_REGS        4
612
 
613
#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)                    \
614
  (  (NAMED) == 0                    ? NULL_RTX                  \
615
   : targetm.calls.must_pass_in_stack (MODE, TYPE) ? NULL_RTX   \
616
   : (CUM) >= FR30_NUM_ARG_REGS      ? NULL_RTX                 \
617
   : gen_rtx_REG (MODE, CUM + FIRST_ARG_REGNUM))
618
 
619
/* A C type for declaring a variable that is used as the first argument of
620
   `FUNCTION_ARG' and other related values.  For some target machines, the type
621
   `int' suffices and can hold the number of bytes of argument so far.
622
 
623
   There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
624
   that have been passed on the stack.  The compiler has other variables to
625
   keep track of that.  For target machines on which all arguments are passed
626
   on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
627
   however, the data structure must exist and should not be empty, so use
628
   `int'.  */
629
/* On the FR30 this value is an accumulating count of the number of argument
630
   registers that have been filled with argument values, as opposed to say,
631
   the number of bytes of argument accumulated so far.  */
632
#define CUMULATIVE_ARGS int
633
 
634
/* A C statement (sans semicolon) for initializing the variable CUM for the
635
   state at the beginning of the argument list.  The variable has type
636
   `CUMULATIVE_ARGS'.  The value of FNTYPE is the tree node for the data type
637
   of the function which will receive the args, or 0 if the args are to a
638
   compiler support library function.  The value of INDIRECT is nonzero when
639
   processing an indirect call, for example a call through a function pointer.
640
   The value of INDIRECT is zero for a call to an explicitly named function, a
641
   library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
642
   arguments for the function being compiled.
643
 
644
   When processing a call to a compiler support library function, LIBNAME
645
   identifies which one.  It is a `symbol_ref' rtx which contains the name of
646
   the function, as a string.  LIBNAME is 0 when an ordinary C function call is
647
   being processed.  Thus, each time this macro is called, either LIBNAME or
648
   FNTYPE is nonzero, but never both of them at once.  */
649
#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
650
  (CUM) = 0
651
 
652
/* A C statement (sans semicolon) to update the summarizer variable CUM to
653
   advance past an argument in the argument list.  The values MODE, TYPE and
654
   NAMED describe that argument.  Once this is done, the variable CUM is
655
   suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
656
 
657
   This macro need not do anything if the argument in question was passed on
658
   the stack.  The compiler knows how to track the amount of stack space used
659
   for arguments without any special help.  */
660
#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)                    \
661
  (CUM) += (NAMED) * fr30_num_arg_regs (MODE, TYPE)
662
 
663
/* A C expression that is nonzero if REGNO is the number of a hard register in
664
   which function arguments are sometimes passed.  This does *not* include
665
   implicit arguments such as the static chain and the structure-value address.
666
   On many machines, no registers can be used for this purpose since all
667
   function arguments are pushed on the stack.  */
668
#define FUNCTION_ARG_REGNO_P(REGNO) \
669
  ((REGNO) >= FIRST_ARG_REGNUM && ((REGNO) < FIRST_ARG_REGNUM + FR30_NUM_ARG_REGS))
670
 
671
/*}}}*/ 
672
/*{{{  How Scalar Function Values are Returned.  */
673
 
674
#define FUNCTION_VALUE(VALTYPE, FUNC) \
675
     gen_rtx_REG (TYPE_MODE (VALTYPE), RETURN_VALUE_REGNUM)
676
 
677
/* A C expression to create an RTX representing the place where a library
678
   function returns a value of mode MODE.  If the precise function being called
679
   is known, FUNC is a tree node (`FUNCTION_DECL') for it; otherwise, FUNC is a
680
   null pointer.  This makes it possible to use a different value-returning
681
   convention for specific functions when all their calls are known.
682
 
683
   Note that "library function" in this context means a compiler support
684
   routine, used to perform arithmetic, whose name is known specially by the
685
   compiler and was not mentioned in the C code being compiled.
686
 
687
   The definition of `LIBRARY_VALUE' need not be concerned aggregate data
688
   types, because none of the library functions returns such types.  */
689
#define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RETURN_VALUE_REGNUM)
690
 
691
/* A C expression that is nonzero if REGNO is the number of a hard register in
692
   which the values of called function may come back.  */
693
 
694
#define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == RETURN_VALUE_REGNUM)
695
 
696
/*}}}*/ 
697
/*{{{  How Large Values are Returned.  */
698
 
699
/* Define this macro to be 1 if all structure and union return values must be
700
   in memory.  Since this results in slower code, this should be defined only
701
   if needed for compatibility with other compilers or with an ABI.  If you
702
   define this macro to be 0, then the conventions used for structure and union
703
   return values are decided by the `TARGET_RETURN_IN_MEMORY' macro.
704
 
705
   If not defined, this defaults to the value 1.  */
706
#define DEFAULT_PCC_STRUCT_RETURN 1
707
 
708
/*}}}*/ 
709
/*{{{  Generating Code for Profiling.  */
710
 
711
/* A C statement or compound statement to output to FILE some assembler code to
712
   call the profiling subroutine `mcount'.  Before calling, the assembler code
713
   must load the address of a counter variable into a register where `mcount'
714
   expects to find the address.  The name of this variable is `LP' followed by
715
   the number LABELNO, so you would generate the name using `LP%d' in a
716
   `fprintf'.
717
 
718
   The details of how the address should be passed to `mcount' are determined
719
   by your operating system environment, not by GCC.  To figure them out,
720
   compile a small program for profiling using the system's installed C
721
   compiler and look at the assembler code that results.  */
722
#define FUNCTION_PROFILER(FILE, LABELNO)        \
723
{                                               \
724
  fprintf (FILE, "\t mov rp, r1\n" );           \
725
  fprintf (FILE, "\t ldi:32 mcount, r0\n" );    \
726
  fprintf (FILE, "\t call @r0\n" );             \
727
  fprintf (FILE, ".word\tLP%d\n", LABELNO);     \
728
}
729
 
730
/*}}}*/ 
731
/*{{{  Trampolines for Nested Functions.  */
732
 
733
/* A C expression for the size in bytes of the trampoline, as an integer.  */
734
#define TRAMPOLINE_SIZE 18
735
 
736
/* We want the trampoline to be aligned on a 32bit boundary so that we can
737
   make sure the location of the static chain & target function within
738
   the trampoline is also aligned on a 32bit boundary.  */
739
#define TRAMPOLINE_ALIGNMENT 32
740
 
741
/*}}}*/ 
742
/*{{{  Addressing Modes.  */
743
 
744
/* A number, the maximum number of registers that can appear in a valid memory
745
   address.  Note that it is up to you to specify a value equal to the maximum
746
   number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept.  */
747
#define MAX_REGS_PER_ADDRESS 1
748
 
749
/* A C compound statement with a conditional `goto LABEL;' executed if X (an
750
   RTX) is a legitimate memory address on the target machine for a memory
751
   operand of mode MODE.  */
752
 
753
/* On the FR30 we only have one real addressing mode - an address in a
754
   register.  There are three special cases however:
755
 
756
   * indexed addressing using small positive offsets from the stack pointer
757
 
758
   * indexed addressing using small signed offsets from the frame pointer
759
 
760
   * register plus register addressing using R13 as the base register.
761
 
762
   At the moment we only support the first two of these special cases.  */
763
 
764
#ifdef REG_OK_STRICT
765
#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL)                        \
766
  do                                                                    \
767
    {                                                                   \
768
      if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))                 \
769
        goto LABEL;                                                     \
770
      if (GET_CODE (X) == PLUS                                          \
771
          && ((MODE) == SImode || (MODE) == SFmode)                     \
772
          && GET_CODE (XEXP (X, 0)) == REG                               \
773
          && REGNO (XEXP (X, 0)) == STACK_POINTER_REGNUM         \
774
          && GET_CODE (XEXP (X, 1)) == CONST_INT                        \
775
          && IN_RANGE (INTVAL (XEXP (X, 1)), 0, (1 <<  6) - 4))          \
776
        goto LABEL;                                                     \
777
      if (GET_CODE (X) == PLUS                                          \
778
          && ((MODE) == SImode || (MODE) == SFmode)                     \
779
          && GET_CODE (XEXP (X, 0)) == REG                               \
780
          && REGNO (XEXP (X, 0)) == FRAME_POINTER_REGNUM         \
781
          && GET_CODE (XEXP (X, 1)) == CONST_INT                        \
782
          && IN_RANGE (INTVAL (XEXP (X, 1)), -(1 << 9), (1 <<  9) - 4)) \
783
        goto LABEL;                                                     \
784
    }                                                                   \
785
  while (0)
786
#else
787
#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL)                        \
788
  do                                                                    \
789
    {                                                                   \
790
      if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))                 \
791
        goto LABEL;                                                     \
792
      if (GET_CODE (X) == PLUS                                          \
793
          && ((MODE) == SImode || (MODE) == SFmode)                     \
794
          && GET_CODE (XEXP (X, 0)) == REG                               \
795
          && REGNO (XEXP (X, 0)) == STACK_POINTER_REGNUM         \
796
          && GET_CODE (XEXP (X, 1)) == CONST_INT                        \
797
          && IN_RANGE (INTVAL (XEXP (X, 1)), 0, (1 <<  6) - 4))          \
798
        goto LABEL;                                                     \
799
      if (GET_CODE (X) == PLUS                                          \
800
          && ((MODE) == SImode || (MODE) == SFmode)                     \
801
          && GET_CODE (XEXP (X, 0)) == REG                               \
802
          && (REGNO (XEXP (X, 0)) == FRAME_POINTER_REGNUM                \
803
              || REGNO (XEXP (X, 0)) == ARG_POINTER_REGNUM)              \
804
          && GET_CODE (XEXP (X, 1)) == CONST_INT                        \
805
          && IN_RANGE (INTVAL (XEXP (X, 1)), -(1 << 9), (1 <<  9) - 4)) \
806
        goto LABEL;                                                     \
807
    }                                                                   \
808
  while (0)
809
#endif
810
 
811
/* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
812
   use as a base register.  For hard registers, it should always accept those
813
   which the hardware permits and reject the others.  Whether the macro accepts
814
   or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
815
   described above.  This usually requires two variant definitions, of which
816
   `REG_OK_STRICT' controls the one actually used.  */
817
#ifdef REG_OK_STRICT
818
#define REG_OK_FOR_BASE_P(X) (((unsigned) REGNO (X)) <= STACK_POINTER_REGNUM)
819
#else
820
#define REG_OK_FOR_BASE_P(X) 1
821
#endif
822
 
823
/* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
824
   use as an index register.
825
 
826
   The difference between an index register and a base register is that the
827
   index register may be scaled.  If an address involves the sum of two
828
   registers, neither one of them scaled, then either one may be labeled the
829
   "base" and the other the "index"; but whichever labeling is used must fit
830
   the machine's constraints of which registers may serve in each capacity.
831
   The compiler will try both labelings, looking for one that is valid, and
832
   will reload one or both registers only if neither labeling works.  */
833
#define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
834
 
835
/* A C expression that is nonzero if X is a legitimate constant for an
836
   immediate operand on the target machine.  You can assume that X satisfies
837
   `CONSTANT_P', so you need not check this.  In fact, `1' is a suitable
838
   definition for this macro on machines where anything `CONSTANT_P' is valid.  */
839
#define LEGITIMATE_CONSTANT_P(X) 1
840
 
841
/*}}}*/ 
842
/*{{{  Describing Relative Costs of Operations */
843
 
844
/* Define this macro as a C expression which is nonzero if accessing less than
845
   a word of memory (i.e. a `char' or a `short') is no faster than accessing a
846
   word of memory, i.e., if such access require more than one instruction or if
847
   there is no difference in cost between byte and (aligned) word loads.
848
 
849
   When this macro is not defined, the compiler will access a field by finding
850
   the smallest containing object; when it is defined, a fullword load will be
851
   used if alignment permits.  Unless bytes accesses are faster than word
852
   accesses, using word accesses is preferable since it may eliminate
853
   subsequent memory access if subsequent accesses occur to other fields in the
854
   same word of the structure, but to different bytes.  */
855
#define SLOW_BYTE_ACCESS 1
856
 
857
/*}}}*/ 
858
/*{{{  Dividing the output into sections.  */
859
 
860
/* A C expression whose value is a string containing the assembler operation
861
   that should precede instructions and read-only data.  Normally `".text"' is
862
   right.  */
863
#define TEXT_SECTION_ASM_OP "\t.text"
864
 
865
/* A C expression whose value is a string containing the assembler operation to
866
   identify the following data as writable initialized data.  Normally
867
   `".data"' is right.  */
868
#define DATA_SECTION_ASM_OP "\t.data"
869
 
870
/* If defined, a C expression whose value is a string containing the
871
   assembler operation to identify the following data as
872
   uninitialized global data.  If not defined, and neither
873
   `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
874
   uninitialized global data will be output in the data section if
875
   `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
876
   used.  */
877
#define BSS_SECTION_ASM_OP "\t.section .bss"
878
 
879
/*}}}*/ 
880
/*{{{  The Overall Framework of an Assembler File.  */
881
 
882
/* A C string constant describing how to begin a comment in the target
883
   assembler language.  The compiler assumes that the comment will end at the
884
   end of the line.  */
885
#define ASM_COMMENT_START ";"
886
 
887
/* A C string constant for text to be output before each `asm' statement or
888
   group of consecutive ones.  Normally this is `"#APP"', which is a comment
889
   that has no effect on most assemblers but tells the GNU assembler that it
890
   must check the lines that follow for all valid assembler constructs.  */
891
#define ASM_APP_ON "#APP\n"
892
 
893
/* A C string constant for text to be output after each `asm' statement or
894
   group of consecutive ones.  Normally this is `"#NO_APP"', which tells the
895
   GNU assembler to resume making the time-saving assumptions that are valid
896
   for ordinary compiler output.  */
897
#define ASM_APP_OFF "#NO_APP\n"
898
 
899
/*}}}*/ 
900
/*{{{  Output and Generation of Labels.  */
901
 
902
/* Globalizing directive for a label.  */
903
#define GLOBAL_ASM_OP "\t.globl "
904
 
905
/*}}}*/ 
906
/*{{{  Output of Assembler Instructions.  */
907
 
908
/* A C compound statement to output to stdio stream STREAM the assembler syntax
909
   for an instruction operand X.  X is an RTL expression.
910
 
911
   CODE is a value that can be used to specify one of several ways of printing
912
   the operand.  It is used when identical operands must be printed differently
913
   depending on the context.  CODE comes from the `%' specification that was
914
   used to request printing of the operand.  If the specification was just
915
   `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
916
   the ASCII code for LTR.
917
 
918
   If X is a register, this macro should print the register's name.  The names
919
   can be found in an array `reg_names' whose type is `char *[]'.  `reg_names'
920
   is initialized from `REGISTER_NAMES'.
921
 
922
   When the machine description has a specification `%PUNCT' (a `%' followed by
923
   a punctuation character), this macro is called with a null pointer for X and
924
   the punctuation character for CODE.  */
925
#define PRINT_OPERAND(STREAM, X, CODE)  fr30_print_operand (STREAM, X, CODE)
926
 
927
/* A C expression which evaluates to true if CODE is a valid punctuation
928
   character for use in the `PRINT_OPERAND' macro.  If
929
   `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
930
   characters (except for the standard one, `%') are used in this way.  */
931
#define PRINT_OPERAND_PUNCT_VALID_P(CODE) (CODE == '#')
932
 
933
/* A C compound statement to output to stdio stream STREAM the assembler syntax
934
   for an instruction operand that is a memory reference whose address is X.  X
935
   is an RTL expression.  */
936
 
937
#define PRINT_OPERAND_ADDRESS(STREAM, X) fr30_print_operand_address (STREAM, X)
938
 
939
/* If defined, C string expressions to be used for the `%R', `%L', `%U', and
940
   `%I' options of `asm_fprintf' (see `final.c').  These are useful when a
941
   single `md' file must support multiple assembler formats.  In that case, the
942
   various `tm.h' files can define these macros differently.
943
 
944
   USER_LABEL_PREFIX is defined in svr4.h.  */
945
#define REGISTER_PREFIX "%"
946
#define LOCAL_LABEL_PREFIX "."
947
#define USER_LABEL_PREFIX ""
948
#define IMMEDIATE_PREFIX ""
949
 
950
/*}}}*/ 
951
/*{{{  Output of Dispatch Tables.  */
952
 
953
/* This macro should be provided on machines where the addresses in a dispatch
954
   table are relative to the table's own address.
955
 
956
   The definition should be a C statement to output to the stdio stream STREAM
957
   an assembler pseudo-instruction to generate a difference between two labels.
958
   VALUE and REL are the numbers of two internal labels.  The definitions of
959
   these labels are output using `(*targetm.asm_out.internal_label)', and they must be
960
   printed in the same way here.  For example,
961
 
962
        fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL)  */
963
#define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
964
fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL)
965
 
966
/* This macro should be provided on machines where the addresses in a dispatch
967
   table are absolute.
968
 
969
   The definition should be a C statement to output to the stdio stream STREAM
970
   an assembler pseudo-instruction to generate a reference to a label.  VALUE
971
   is the number of an internal label whose definition is output using
972
   `(*targetm.asm_out.internal_label)'.  For example,
973
 
974
        fprintf (STREAM, "\t.word L%d\n", VALUE)  */
975
#define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
976
fprintf (STREAM, "\t.word .L%d\n", VALUE)
977
 
978
/*}}}*/ 
979
/*{{{  Assembler Commands for Alignment.  */
980
 
981
/* A C statement to output to the stdio stream STREAM an assembler command to
982
   advance the location counter to a multiple of 2 to the POWER bytes.  POWER
983
   will be a C expression of type `int'.  */
984
#define ASM_OUTPUT_ALIGN(STREAM, POWER) \
985
  fprintf ((STREAM), "\t.p2align %d\n", (POWER))
986
 
987
/*}}}*/ 
988
/*{{{  Miscellaneous Parameters.  */
989
 
990
/* An alias for a machine mode name.  This is the machine mode that elements of
991
   a jump-table should have.  */
992
#define CASE_VECTOR_MODE SImode
993
 
994
/* The maximum number of bytes that a single instruction can move quickly from
995
   memory to memory.  */
996
#define MOVE_MAX 8
997
 
998
/* A C expression which is nonzero if on this machine it is safe to "convert"
999
   an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
1000
   than INPREC) by merely operating on it as if it had only OUTPREC bits.
1001
 
1002
   On many machines, this expression can be 1.
1003
 
1004
   When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for
1005
   which `MODES_TIEABLE_P' is 0, suboptimal code can result.  If this is the
1006
   case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve
1007
   things.  */
1008
#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1009
 
1010
/* An alias for the machine mode for pointers.  On most machines, define this
1011
   to be the integer mode corresponding to the width of a hardware pointer;
1012
   `SImode' on 32-bit machine or `DImode' on 64-bit machines.  On some machines
1013
   you must define this to be one of the partial integer modes, such as
1014
   `PSImode'.
1015
 
1016
   The width of `Pmode' must be at least as large as the value of
1017
   `POINTER_SIZE'.  If it is not equal, you must define the macro
1018
   `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'.  */
1019
#define Pmode SImode
1020
 
1021
/* An alias for the machine mode used for memory references to functions being
1022
   called, in `call' RTL expressions.  On most machines this should be
1023
   `QImode'.  */
1024
#define FUNCTION_MODE QImode
1025
 
1026
/* If cross-compiling, don't require stdio.h etc to build libgcc.a.  */
1027
#if defined CROSS_DIRECTORY_STRUCTURE && ! defined inhibit_libc
1028
#define inhibit_libc
1029
#endif
1030
 
1031
/*}}}*/ 
1032
 
1033
/* Local Variables: */
1034
/* folded-file: t   */
1035
/* End:             */

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